I don't know about solar powered fountains, but there are a lot of fountains on this website.

http://www.kobe…

I'm thinking about the hidden rock one,
http://www.sili…

I bought this solar powered fountain at simplyfountains.com: http://www.simp…

I liked it and it worked great, but the problem is that it (and I think all of them) needs very bright, direct sun to function (if a cloud passes over then it stops flowing until the sun is exposed again). The direct sunlight causes the water to either evaporate quickly or turn green. For me, it became too much work to keep it clean and full of water so now it's in the garage :(.

i would check ebay I find really good deals on everything there